Reeling machine



June 10, .1930. J, HOLLINS ET AL REELING MACHINE il 1929 3 Sheets-Sheet l June 10, 1930.

J. HoLLpNs ET AL REELING MACHINE A Fil Jan. 1929 3 Sheets-Sheet 3 1 Patented June 10, 1930 UNITED STATES Ars r or fice JACK HoLL'INs, ornrnntnwron, AND DOUGLAS J'EPSON, or Grossor, ENGLAND, ASSIGNORS TO IMPERIAL CHEMICAL INDUSTRIES LIMITED, OF'LONDON, ENGLAND,

; A BRITISH ooMrANY "IREELING MACHINE Application filed January 16, i929, Serial No. amaze-and in Great BritaiirFebruary s, 1928.

This invention relates to, reeling machines, adapted for effecting the release and withdrawal of metal tubes from the mandrels on which they deposition or otherwise. I

- The invention comprises an improved formation and arrangement of the operating surfaces of the rolls and the associated work support, and improved means of mounting the said rolls with the provision for impart: ing the desired pressure upon the same and on the work passing'between them.

Referringto the accompanying sheet of explanatory drawings Figure 1 is an end elevation showing the rolls and work support.

Figure 2 is a sectional elevation on the line A B and looking from right to left of Figure l. p s

Figure 3 is a plan view, drawn to an enlarged scale, showing the rolls and the work in position between them.

Figure 4.- is a longitudinal sectional view through the work, also showing the work support and the back roll.

Figure 5 is a plan view similar to Figure 3 drawn to a smallerscale, but showing the means for applying pressure between the rollerand workpiece.

Figure 6 is a front view of the pressure regulating me ans shown in Figure 5.

Figure 7 is a back view of the machine shown in Figure 5. i

The same reference letters in the different views indicate the same parts.

The two rolls a, b of the. tube reeling machine are disposedside by side with a work support 0 beneath or in the lower portion of the space or work pass between them, the axes of the rolls being inclined at'opposite angles (preferably about 4 to the'horizontal) so that, in known manner, the action of the rotating rolls imparts both a rotary and a longitudinal movement to the work (the tube d and its mandrel e) on which they operate. Both rolls are positively driven by means not shown. V

The two rolls are journaled in roller bearings f, g and such journals are capable of a sliding movement on the frame members it have been formed by electro-.

of the machine. The rear journals are loaded against movement away from the front roll 16 by relatively strong springs 11 and by relatively weak springs j, a certain amount of movement of the said journals being necessary against the action of the light springs j before the heavier springs become operative. Figure 1, shows the operator the amount of pressure being applied between the rolls in the workpiece as measured by the movement of'therear roll a against the pressure of the springs d and j. Such indicator maybe" marked to show when the rear roll is still being resisted only by the light springs j.

'The loading of the workpieceby the rolls is effected by means'of the handwheel m which turns a worm shaft n engaging worm wheels 0 on screwed shafts p which traverse roll'a'under the'pr'ess'ure of'the front roll b'on the workpiece maybe" provided by a 775 An indicating; dial is, V

weighted lever, or by hydraulic or 'compressed air system, "Such yieldingresistance prevents the amming of the work or damage I to the same by the occurrence'of unduejpres sure between it and the rolls and the work tive surfaces of the. rolls issuch'as to provide'a work passatjabout'g (Figures 3, 4 and 5) between them which isparalhl fora short length'orwidth at the centre of the rolls, with a curved or tapered, portion'on each side of it 'extending from such parallel i v portion to the resp'ective ends' of "the rolls.

Each'of the said curved portions of the roll pass is of smallest diameter at the ends curva'tureisvery slight towards the centre out immediately to accomodatethe increased The contours of the peripheries or operaof the rolls. 'Onfthe work enteringside, the

diameter of the tube due tOfthe expansive V the rolls.

flow of the metal set up by the' pressure of .The worksupport'csuitably disposed beneath or in the lower portion of the roll I in the diameter of the tube during its progress through the roll pass. The work support is attached to the spring loaded journal bearing blocks of the roll a, and moves with and in the same horizontal plane as the roll a, thereby keeping the work in a definite position on the bar as pressure is applied to the work by the pressure operating gear. The roll a is of slightly larger diameter than. the other and it exerts a downward pressure on the tube (Z towards the work support a. The said pressure, together with that between the rolls themselves sets up the necessary expansion of the tube as it leaves the parallel portion of the roll pass to release the tube from its mandrel.

The slight curvature as aforesaid on the leading in side of the roll pass ensures a gradual increase of the pressure on the tube to the zone of maximum pressure at the centre or parallel portion of the pass. The amount of such maximum pressure is adjusted by the aforesaid means for imparting positive sliding movement to one of the rolls, the pressure being indicated by the dial is.

The length or width of the arallel' portion 9 of the roll pass is pref rably made slightly in excess of the traverse or longitudinal movement imparted to the tube during one rotation of'the axially inclined rolls. After the passage ofa tube and its mandrel through the roll pass the tube can be readily withdrawn by hand from its mandrel.

, What we claim is:

1. In a reeling machine for freeing a metal tube from the mandrel on which it has been produced, in combination, a pair of positively driven co-operating rolls by which the tube and mandrel have rotary and longi tudinal movements imparted thereto, each roll having a curved contour at the work entering side which gradually increases in diameter until it reaches a maximum where there is a short parallel portion, the work leaving side of the parallel portion decreasing suddenly in diameter and thereafter further gradually decreasing in diameter towards the work leaving side of the roll, a work support beneath the rolls which is stepped downwards beneath the parts of the roll contours which decrease suddenly in diameter, and means applying a yielding pressure through the rolls to the tube upon the mandrel.

2. In a reeling machine as claimed in claim 1, means for moving positively one roll of the machine to adjust the pressure upon the workpiece, with yielding means acting against the other roll to resist such movement and thereby impose pressure on the workpiece between the rolls.

3. In a reeling machine as claimed in claim 1, means moving positively one roll of the machine to apply pressure to the work between the rolls, and springs which come into operation successively for resisting the movement of the other roll so as to regulate the pressure applied. to the workpiece.

4. In a reeling machine as claimed in claim 1, means moving positively and simultaneously the two ends of one roll to apply pressure to the workpiece between the rolls,

and springs of different strengths acting upon the opposite ends of the other roll and which come into operation successively as such roll is moved in order to regulate the pressure yieldingly applied to the workpiece. 5. In a reeling machine as claimed in claim 1, means moving positively one roll of the machine by its hearings to apply pressure to the work between the rolls, yielding means acting against the bearings of the other roll to resist such movement and thereby impose pressure on the workpiece between the rolls, and'means carrying the work support from the bearings of the yieldingly loaded roll. In testimony whereof we have signed our names to this specification.

JACK HOLLINS. DOUGLAS JEPSON. 

